Effect of microwave sintering process on microstructure and properties of Ti-Mg composites

doi:10.13251/j.issn.0254-6051.2022.09.004

Abstract

Abstract: In order to determine the optimal microwave sintering process for preparing Ti-Mg composites, Ti-15Mg composites were prepared by microwave sintering. The effects of sintering temperature and holding time on microstructure, mechanical properties and corrosion resistance of the composites were systematically studied by means of scanning electron microscope, differential thermal analysis, X-ray diffraction, optical microscope, compression test and corrosion resistance test. The results show that when the sintering temperature is 540-600 ℃, with the increase of sintering temperature, the densification degree of the composites increases, the porosity decreases, the compressive strength and corrosion resistance increase. When the sintering temperature is 600 ℃, magnesium is uniformly distributed in the titanium matrix, and the performance of the composites is the best, meeting the performance requirements of medical materials. The continuous increase of sintering temperature leads to a large amount of volatilization of magnesium in the composites. The porosity increases and the strength of the composites decreases. Ti-15Mg composites prepared by microwave sintering have the characteristics of fast and stable sintering, so the effect of holding time on properties of composites is not obvious.

Key words: sintering temperature, holding time, Ti-15Mg composites, microstructure, mechanical properties, corrosion resistance

CLC Number:

TG146.2

Xia Pengzhao, Xu Ying, Cai Yanqing, Zhao Sitan, Lou Bingjie. Effect of microwave sintering process on microstructure and properties of Ti-Mg composites[J]. Heat Treatment of Metals, 2022, 47(9): 18-26.

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